$def with (post, form)
<!-- edit.html -->
<!-- 编辑博客页面 -->

<h1>编辑 $form.d.title</h1>
<form action="" method="POST">
    $:form.render()
</form>
<h2>删除博客</h2>
<form action="/delete/$post.id" method="POST">
    <input type="SUBMIT" value="删除博客"/>
</form>
